Replacing rubber: Please rank the difficulty of these three jobs.

[Shortsguy1]

Hi, I have a 1968 220D (W115, OM615 me thinks) with automatic transmission and unknown mileage (broken odometer). Most of the rubber on the car has failed, so it really needs new motor mounts, new front subframe mounts, and new rear subframe mounts. Assuming your car is similar to mine, I am trying to decide which jobs to do myself, and which ones to have a garage do. My local indy merc garage wants ~$1000 total for each of these jobs, with about 1/3 of that parts and 2/3 labor. I cannot afford to pay them to do them all, nor do I have time to do them all myself. So which could a moderate DIY'er tackle and which would you recommend I pay an expert to do. Thanks for the advice.

So here are the jobs:
1) Left and right engine mounts and transmission mount
2) Front subframe mounts
3) Rear subframe mounts and differential mount

[Biodiesel300TD]

The motor mounts and trans mount can be changed with minimal tools. Just need a floor jack and some various wrenches and sockets, and could be done in a afternoon. The subframe bushings are a much more work, and require a few special tool such as spring compressor and a press of some sort.

[t walgamuth]

I would suggest replacing the motor and tranny mounts and see if that cures whatever you are chasing. The subframe mounts usually don't cause much trouble.

[Zeppo2K2]

My '71 220D had a buzzing noise at speed, about 50mph, that sounded like the exhaust system touching the frame, with power applied. Foot off accelerator and the noise stopped. I spent a lot of time looking at the exhaust system, but it turned out the sub frame rubber bushings were collapsed. Taking out the 4 bolts was not easy, one of the front ones was bent. I was able to get them out, lift the car enough off the sub frame to get the bushings out and replaced, and that did the trick - quiet.

[pawoSD]

Engine and trans mounts are not very difficult, but suspension bushings are a whole different realm of difficult. I have done the rear ones, its not much fun.